<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* 盒子模型能用width 实现就不要用padding和margin  */
        div{
            width: 300px;
            height: 50px;
            border: 1px solid pink;
        }
        h3{
            margin-left: 100px;
        }
    </style>
</head>
<body>
    <div>
        <h3>稳住我们能赢</h3>
    </div>
</body>
</html>